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| Number | Title | Issue Date |
| 8169260 | Amplifier circuit utilizing characteristic correction and smooth curvilinear correction An amplifier circuit performs a characteristic correction process and a smooth curvilinear process on an input signal before being subjected to amplification. The characteristic correction process is a frequency characteristic process, which is performed on the inpu... | 05/01/2012 |
| 8130032 | Systems and methods for high-sensitivity detection of input bias current The invention relates to systems and methods for high-sensitivity detection of input bias current. The invention more particularly relates to platforms and techniques for the calibration and measurement of input bias current in op amps or other devices. In embodimen... | 03/06/2012 |
| 8120421 | Circuit structure free from test effect and testing method thereof A circuit structure free from test effect is provided. The circuit structure includes a first test terminal and a second test terminal. A symmetric circuit unit is coupled between the first test terminal and the second test terminal. The symmetric circuit unit inclu... | 02/21/2012 |
| 8040179 | Apparatus and method for estimating power for amplifier Described herein is an apparatus and method for estimating the amount of power that is to be consumed by an amplifier. An estimation section may be determined based on frame data of an input signal that is to be input to the amplifier. The estimation section may be ... | 10/18/2011 |
| 8022755 | Amplifier with automatic gain profile control and calibration Embodiments of the present invention provide systems and methods for automatic amplifier gain profile control, including a method for automatically configuring a variable gain profile amplifier according to received input and a variable gain profile amplification sy... | 09/20/2011 |
| 7965136 | Multiport amplifier adjustment The invention provides a method and apparatus for applying test signals to a multiport amplifier (MPA) and a method, apparatus and system for determining parameter adjustments for an MPA. Applying test signals to an MPA is performed so as to provide an output signal... | 06/21/2011 |
| 7932776 | RF power transmission, modulation, and amplification embodiments Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one... | 04/26/2011 |
| 7863975 | Method for calibrating a power amplifier and device using the same A calibration device for a power amplifier includes a calculation unit, a first storage unit and a multiplier. The calculation unit is utilized for generating a calibration factor according to a value of a characteristic parameter of the power amplifier. The first s... | 01/04/2011 |
| 7859330 | Optimized uplink efficiencies for transmission of satellite data Systems and methods for characterizing amplifiers. A system for characterizing an amplifier in accordance with the present invention comprises a Gaussian signal source for generating a signal in the frequency domain, a notch filter, coupled to the Gaussian Noise sou... | 12/28/2010 |
| 7804356 | Amplifier with automatic gain profile control and calibration Embodiments of the present invention provide systems and methods for automatic amplifier gain profile control, including a method for automatically configuring a variable gain profile amplifier according to received input and a variable gain profile amplification sy... | 09/28/2010 |
| 7772922 | Method and system for testing data signal amplifier having output signal power dependent upon multiple power control parameters A method and apparatus for testing a data signal amplifier having an output signal power dependent upon multiple signal power control parameters, e.g., signal gain control and amplifier bias current control. ... | 08/10/2010 |
| 7772923 | Test circuit for programmable gain amplifier A test circuit, for checking whether at least one programmable gain amplifier (PGA) operates correctly, includes a signal generator, a gain controller, a test level output circuit, a comparison circuit and an identifying circuit. The signal generator is utilized for... | 08/10/2010 |
| 7642845 | Circuit for creating tracking transconductors of different types Systems and method for tracking different types of transconductance cells is shown and described. In these multi-cell systems, the addition of one or more tracking control modules allows circuit designers to advantageously incorporate multiple transconductor topolog... | 01/05/2010 |
| 7639072 | Controlling a power amplifier to transition among amplifier operational classes according to at least an output signal waveform trajectory Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one... | 12/29/2009 |
| 7636013 | Method and integrated circuit including an amplifier calibration circuit An integrated circuit including a circuit for calibration and offset compensation of an amplifier method is disclosed. In one embodiment, the method includes providing a reference input signal to the input of an amplifier, coupling the output signal of the amplifier... | 12/22/2009 |
| 7545206 | Apparatus for and method of biasing a transistor An apparatus for biasing a transistor, comprising: a controllable bias generator; a test circuit; a digital Mth order differentiator responsive to an output of the test circuit; and a controller responsive to the digital Mth order differentiato... | 06/09/2009 |
| 7535292 | Optimized uplink efficiencies for transmission of satellite data Systems and methods for characterizing amplifiers. A system for characterizing an amplifier in accordance with the present invention comprises a Gaussian signal source for generating a signal in the frequency domain, a notch filter, coupled to the Gaussian Noise sou... | 05/19/2009 |
| 7528649 | Method for designing input circuitry for transistor power amplifier A circuit having: an input matching network; a transistor coupled to an output of the input matching network; and wherein the input matching network has a first input impedance when such input matching network is fed with an input signal having a relatively low powe... | 05/05/2009 |
| 7489186 | Current sense amplifier for voltage converter A current sense amplifier for a voltage converter wherein the voltage converter has at least one channel providing an output current through an output inductor, the current sense amplifier monitoring the current in the at least one channel through the output inducto... | 02/10/2009 |
| 7436253 | Method and system for fast calibration to cancel phase feedthrough Methods and systems for fast calibration to cancel phase feedthrough are disclosed and may comprise individually activating each of n binary-weighted cells utilizing a control signal in a power amplifier driver (PAD) and measuring the output signal, or offset, in re... | 10/14/2008 |
| 7423477 | Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one... | 09/09/2008 |
| 7417394 | Arrangement for testing a power output stage The invention concerns a device for controlling a final power-output stage, the latter comprising three half-bridges consisting respectively of a series circuit including an upper semiconductor switch and a lower semiconductor switch and subjected to a service volta... | 08/26/2008 |
| 7414469 | Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one... | 08/19/2008 |
| 7392021 | Apparatus, system, and method for measuring power delivered to a load Apparatus, system, and method including a circuit including an element having an electrical impedance, an input node to receive a signal, and an output node to couple to a load; a sensing circuit coupled to the input node and the output node to sense a differential ... | 06/24/2008 |
| 7383145 | Programmable calibration circuit for power supply current sensing and droop loss compensation A circuit for regulating power is disclosed. The present invention provides circuits and methods for current sensing variations, static droop settings, mismatched phase outputs, and temperature variations in a multiphase power regulator. The circuits may include a c... | 06/03/2008 |
| 7382182 | System for reducing calibration time of a power amplifier A system for reducing the calibration time of a Power Amplifier (PA) (202) is provided. The system includes a memory module (304) that is integrated in the PA. The memory module is configured to store one or more calibration parameters of the PA. ... | 06/03/2008 |
| 7378906 | Method and apparatus for performing digital pre-distortion A pre-distorter that compensates for amplitude and phase distortion created by an amplifier. During a training session, the amplifier is stimulated with input signals of pre-selected amplitude and phase at various temperatures and the amplifier output is captured an... | 05/27/2008 |
| 7378902 | Systems and methods of RF power transmission, modulation, and amplification, including embodiments for gain and phase control Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one... | 05/27/2008 |
| 7366252 | Wideband enhanced digital injection predistortion system and method A system for linearizing RF amplifiers employing baseband predistortion techniques provides additive or multiplicative predistortion of the quadrature (I/Q) input signal. The predistorter uses a discrete-time polynomial kernel to model the inverse transfer character... | 04/29/2008 |
| 7365597 | Switched capacitor amplifier with higher gain and improved closed-loop gain accuracy A switched capacitor CMOS amplifier uses a first stage non-inverting CMOS amplifier driving a second stage inverting CMOS amplifier. The first stage amplifier is provided with positive feedback to substantially increase the gain of the first stage amplifier. In the ... | 04/29/2008 |
| 7365800 | Method for pre-processing image data A method for pre-processing image data, including steps of: receiving primary image data corresponding to an image or a sequence of images to be displayed; pre-processing the primary image data by applying a pre-distortion operation to the primary image data so as t... | 04/29/2008 |
| 7362818 | Amplitude and phase comparator for microwave power amplifier A predistortion power amplifier architecture has a power amplifier which receives an input via an amplitude modulator and a phase modulator. A sample of the output of the amplifier and a sample of the input to the amplifier are applied to an adaptive pre-distorter s... | 04/22/2008 |
| 7358800 | Programmable/tunable active RC filter A programmable/tunable active low-pass filter at least has the resistors, capacitors and shunt control means. It uses the resistor ladder that is structured with various fixed resistors to implement the shunt control means. The cut-off frequency of a filter is assoc... | 04/15/2008 |
| 7355470 | Systems and methods of RF power transmission, modulation, and amplification, including embodiments for amplifier class transitioning Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one... | 04/08/2008 |
| 7356315 | Outphasing modulators and methods of outphasing modulation In one exemplary embodiment of the invention, an outphasing modulator may include at least a multiplier to multiply an amplitude modulation signal by a phase modulated carrier signal to generate a modulated signal. The outphasing modulator may also include a phase s... | 04/08/2008 |
| 7356102 | Gain compensation over temperature and frequency variations in wireless transceivers Systems and methods are provided for controlling gain compensation over temperature and frequency variations. A variable amplifier may be used to receive a control signal and an input signal. The variable amplifier may be operable to apply a gain to the input signal... | 04/08/2008 |
| 7352794 | Method and arrangement for use in a single user detector for a CDMA multi-path system A method and arrangement for use in a single user detector in a CDMA multi-path system, comprising providing a finite impulse response (FIR) filter; and configuring the FIR filter to derive at least a first, then a second, then a third, then a fourth of the followin... | 04/01/2008 |
| 7352242 | Programmable gain trim circuit A programmable gain amplifier includes a first gain setting circuit and a second gain setting circuit that are both coupled to an output of an amplifier. A trim adjustment circuit is and arranged to complete feedback to the amplifier by digitally panning between the... | 04/01/2008 |
| 7353005 | Wireless communication unit and linearised transmitter circuit therefor A wireless communication unit (300) comprises a linearised transmitter (325) having a forward path, a power amplifier (324) and a feedback loop, operably coupled to the power amplifier (324) and the forward path. The feedback loop compris... | 04/01/2008 |
| 7349273 | Access circuit and method for allowing external test voltage to be applied to isolated wells An access circuit selectively couples an externally accessible terminal to each of a plurality of isolated DRAM wells in which respective DRAM arrays are fabricated. The access circuit for each well includes first and second transistors fabricated in respective well... | 03/25/2008 |
